The IoT architecture can be divided into three layers.（ ）is the key layer to realize the foundational capabilities which support the electronic devices interact with physical world.
Sensing layer
Network layer
Application layer
Operation layer
物联网架构可以分为三层。（感知层）是实现支持电子设备与物理世界交互的基础功能的关键层。
A. 感知层
B. 网络层
C. 应用层
D. 操作层